Carbon-sheet holder



April 20 1926. 1,581,195

. A. S. GILMAN ET AL CARBON SHEET HOLDER Filed D C. 19, 1923 2Sheets-Sheet l vszvroes: g J

ATTOENEV.

April 20, 1926. 1581,195

A. S. GILMAN ET AL CARBON SHEET HOLDER Fil d 6 19, 1923 2 Sheets-Sheet 2V ATTOE/VEK I ing that principle, so as to distinguis from otherinventions.

Our invention relates to holders for car- Patented Apr. 20, 1926.

UNITED- STATES 1,581,195 PATENT OFFICE.

ARTHUR S. GILMAN, OF CLEVELAND HEIGHTS, OHIO, AND JOHN E. DOODY, OFTORONTO, ONTARIO, CANADA; SAID DOODY ASSIGNOR TO SAID GILMAN.

- CARBON-SHEET HOLDER.

Applicationflled December 1.9, 1923. Serial m 681,634;

T 0 all whom it may concern:

Be it known that .we, ARTHUR S. GILMAN, a citizen of the United States,resident of the city of Cleveland Heights, county of Cuyahoga, and Stateof Ohio, and JOHN E. Doom, a citizen of the Dominion of Canada, city ofToronto, county'of York, Province of Ontario, and Dominion of Canada,have invented. new and useful Improvements in Carbon-Sheet Holders, ofwhich the following is a specification, the principle of the inventionbeing herein explained and the best mode in which we have contemplatedap lybonsheets used in connection with duplicatingtype-writing machines,and which carhon-sheets are ordinarily'known in the art as floatingcarbons. v

Heretofore it has been customary in this class of devices, to providetransverse holding means or bars to which the ends of the carbon-sheetswere directly attached as shown, for example in the Smith Patent No.1,177,546, this structure being now generally employed in connectionwith the Underwood duplicating type-writing machine.

These heretofore used constructions furthermore have been such that aconsiderable part of the end portions of the carbons which are attachedcould not be used for duplicating purposes and hence was Wasted.Furthermore, and especially in the Underrial of such sheets.

In addition, the attachment of the carbonsheets directly to the holding.bars, on account of the greater flexibility and thin character of thecarbon-sheets, made it necessary to use considerable care in suchattachment in order to bring the lateral edges of the carbon-sheets inlines exactly parallel with the direction of feed thereof, in order thatthey might pass properly between the platen and pressure rolls.

The object of our invention is to provide means whereby suchabove-mentioned waste is eliminated, the carbon-sheets may be easilyattached and removed from the holding bars, and whereby they may beeasily placed in said position in which their edges are exactly parallelwith the line of feed.

To this end, our invention comprises a member to-which the end of thecarbonsheet may be readily and accurately attached and which may bereadily and accurately attached to the holding bars, thereby providingan element intermediate to the end of the carbon-sheet and the holderwhich is designed to actuate it.

The said invention consists of means hereinafter fully described andparticularly set forth in the-claims.

The annexed drawings and the following description set forth in detailcertain means embodying our invention, the disclosed means, however,constituting but one of the various mechanical forms in which theprinciple of the invention may be employed.

Figure 1 represents a plan of that part of an Underwood duplicatingtype-writing machine includingthe carbon-sheet operating mechanism.

Fig. 2 represents a longitudinal section taken upon the plane indicatedby line IIII, Fig. 1.

Fig. 3 represents a detailed longitudinal section taken upon the planeindicated by line III-III, Fig. 1.

Fig. 4 represents a plan; of one of the in termediate members formingpart of my invention.

Figs. 5 and 6 represent respectively a plan and side elevation of one ofthe clips used in connection with the securing of the carbon-sheets tothe intermediate members.

' The illustrated embodiment of our invention includes a flat element 1,preferably made of thin, but comparatively stiff, paper.

By comparatively stifi' we mean stiff as compared with the ordinarysheet of carbonpaper. t This element is formed with a transversebody-member 2, a central longitudinal extension 3 projecting from thebody member centrally thereof, and two flaps 4-4 which are hinged(preferably by being integrally united) to the transverse edges 55 ofthe body member 2 which are adjacent to the edges 3, all as shown inFig. 4. The other edge portion 6 of the body member is preferablyreinforced with the light cloth materal 7 which provides a reinforcementfor such edge portion.

with the axis of the element, as shown in Figs. This brings thelongitudinal edges of the carbon-sheet parallel with the axis of theelement 1, and said sheet is secured in such. position by slipping twoclips 8, over the flaps, one over each of the latter as shown in Fig. 4.These clips may be "made of any suitable form, as will be readilyunderstood. The clips bear down upon the flaps and press same againstthe intermediate carbon-sheet so as to secure the latter.

between the flaps and the body member 2.

The free end of the extension 3 is then secured centrally to one of thetransverse carbon-sheet holding bars 9 of the carbonsheet holding andoperating mechanism by' securing same between said bar and the hingedclamping member 10 of such'bar. The free transverse edge 11 of thisextenslon is formed accurately at right angles to the axis of theelement 1 so that this free edge may, when the extension is so secured,be caused to assume a position exactly parallel with the direction offeed of the carbonsheet. The stiffness of this element will lend itselfto this accuracy of adjustment.-

These holding bars are, in the type of machine to which this inventionis shown to be applied, stepped from each other in the direction ofcarbon-feed as is well known, to those skilled in the art.

To compensate for this'stepped arrangement, we provide elements 1 havingdiiferent lengths of extensions 3, as is shown 1n dotted lines in Fig.4, the difference in these lengths corresponding to the longitudinaldifference in the position of the axes of the holding bars9. Elements 1are selected for attachment to the bars having such length as willcompensate for this stepped relation so that when all of theintermediate elements 1 are secured upon their respective bars, the rearedges 5-5 of the body portions 2 will be in longitudinal alinement witheach other, which will effect, therefore, the required alineinent of thecarbon-sheets. Such position of the latter will bring the front edges ofthe carbon-sheets into exact alinement with each other.

It will therefore be seen that the carbon sheets may be readily attachedto and detached from the intermediate element 1 and the latter may bereadily attached to and do tached from the holding bars 9.

Furthermore, inasmuch as the device and the method of attachment of thecarbons thereto does not mutilate the carbon paper, the latter may bereversed after the forward portion thereof has been used up, so as touse that portion. of the carbon-sheet which was adjacent and secured tothc'holding de vice and hence could not pass around the platen roll ofthe type-writing machine.

In practice we prefer to make the length of the carbon-sheetssubstantially twice that which is necessary for writing upon a givenlength of form so that upon reversal a length ofcarbon-sheet ispresented for use which will answer all the requirements of thesucceeding writing operations;

What we claim is 1. A carbon-sheet holder comprising a sheet of suitablematerial and adapted to be secured to the carbon-sheet operating meansof a duplicating typewriter; and means for detachably securing the endportions of a carbon-sheet thereto.

2. A carbon-sheet holder comprising a sheet of suitable material cut toform a main transverse body member and a longitudinal extension; andmeans for detachablysecuring the end portion of a carbon-sheet to saidbody member.

3. A carbon-sheet holder comprising a flat piece of suitable materialformed with a transverse body member, a longitudinal extension, and aflap portion adapted to fold over upon said body member in alongitudinaldirection; and detachable means for glamping said flap portion againstsaid mem- 4;. A carbon-sheet holder comprising a flat piece of suitablematerial formed with a transverse body member, a central longitudinalextension and two flaps, one upon each side of said extension andattached to the transverse edges of said bod portion adja: cent to saidextension, said aps adapted to fold over upon the face of said member;and means for securing said flaps in their folded position.

5. In a duplicating type-writing machine, the combination of acarbon-sheet operating device including a transverse bar; a carbonsheetholder detachably secured to said'bar; and a carbon-sheet detachablysecured to said holder.

Signed by me this 1st day of December, 1923.

JOHN E. DOODY.

